Difference between revisions of "FPGA registers access from Linux userspace"
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(New page: == FPGARegs usage == * Write to a FPGA address: ''fpgareg addr value'' # fpgaregs 1000 abcd this will write 0xabcd (16bits only interface) at the FPGA internal address 0x1000 * Read a F...) |
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[[Category:FPGA]] | [[Category:FPGA]] | ||
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| + | ==Changing FPGA IP's registers from Linux user space with fpgaregs== | ||
| + | |||
| + | This tool allows you to access FPGA registers from linux userspace/console. This way you can easily debug your driver directly from the Linux console. | ||
| + | |||
| + | First, you have enable this tool in Buildroot (package selection for target): | ||
| + | $ make menuconfig | ||
| + | |||
| + | Once done, compile it: | ||
| + | $ make | ||
| + | |||
| + | The generated file is located in buildroot/build_arm_nofpu/fpgaregs-1.0/. Now you can copy it on your target. | ||
| + | Then in linux, launch it like that: | ||
| + | # fpgaregs address (for read) or fpga address value (for write) | ||
| + | |||
| + | ===Examples:=== | ||
| + | Show register at internal FPGA address 0x0010: | ||
| + | # fpgaregs 10 | ||
| + | |||
| + | Write 0x0123 to FPGA register 0x0020: | ||
| + | # fpgaregs 20 0123 | ||
Revision as of 14:33, 8 April 2008
FPGARegs usage
- Write to a FPGA address: fpgareg addr value
# fpgaregs 1000 abcd
this will write 0xabcd (16bits only interface) at the FPGA internal address 0x1000
- Read a FPGA address: fpgareg addr
# fpgaregs 1000
this will read the address 0x1000
For details take a look at this page: Tips to debug under Linux
Changing FPGA IP's registers from Linux user space with fpgaregs
This tool allows you to access FPGA registers from linux userspace/console. This way you can easily debug your driver directly from the Linux console.
First, you have enable this tool in Buildroot (package selection for target):
$ make menuconfig
Once done, compile it:
$ make
The generated file is located in buildroot/build_arm_nofpu/fpgaregs-1.0/. Now you can copy it on your target. Then in linux, launch it like that:
# fpgaregs address (for read) or fpga address value (for write)
Examples:
Show register at internal FPGA address 0x0010:
# fpgaregs 10
Write 0x0123 to FPGA register 0x0020:
# fpgaregs 20 0123
